Wavesurfer.js is a javascript library to create interactive navigable audio visualization using Web Audio and HTML5 Canvas. With wavesurfer.js you can create a cute HTML5 audio player or a sophisticated DJ application.

OKVideo is a jQuery plugin that allows for YouTube or Vimeo videos to be used as full-screen backgrounds on webpages. OKVideo aims to be customizable while making some basic decisions about how the plugin should control video. When using OKVideo, all videos will be served from Vimeo or YouTube based on a number of variables like browser, device, bandwidth, etc.